483 lines
14 KiB
C
483 lines
14 KiB
C
/* $NetBSD: rf_disks.c,v 1.5 1999/02/05 00:06:09 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/***************************************************************
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* rf_disks.c -- code to perform operations on the actual disks
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***************************************************************/
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#include "rf_types.h"
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#include "rf_raid.h"
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#include "rf_alloclist.h"
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#include "rf_utils.h"
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#include "rf_configure.h"
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#include "rf_general.h"
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#if !defined(__NetBSD__)
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#include "rf_camlayer.h"
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#endif
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#include "rf_options.h"
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#include "rf_sys.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/fcntl.h>
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#include <sys/vnode.h>
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int raidlookup __P((char *, struct proc * p, struct vnode **));
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#define DPRINTF6(a,b,c,d,e,f) if (rf_diskDebug) printf(a,b,c,d,e,f)
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#define DPRINTF7(a,b,c,d,e,f,g) if (rf_diskDebug) printf(a,b,c,d,e,f,g)
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/****************************************************************************************
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*
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* initialize the disks comprising the array
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*
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* We want the spare disks to have regular row,col numbers so that we can easily
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* substitue a spare for a failed disk. But, the driver code assumes throughout
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* that the array contains numRow by numCol _non-spare_ disks, so it's not clear
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* how to fit in the spares. This is an unfortunate holdover from raidSim. The
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* quick and dirty fix is to make row zero bigger than the rest, and put all the
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* spares in it. This probably needs to get changed eventually.
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*
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***************************************************************************************/
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int
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rf_ConfigureDisks(
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RF_ShutdownList_t ** listp,
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RF_Raid_t * raidPtr,
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RF_Config_t * cfgPtr)
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{
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RF_RaidDisk_t **disks;
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RF_SectorCount_t min_numblks = (RF_SectorCount_t) 0x7FFFFFFFFFFFLL;
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RF_RowCol_t r, c;
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int bs, ret;
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unsigned i, count, foundone = 0, numFailuresThisRow;
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RF_DiskOp_t *rdcap_op = NULL, *tur_op = NULL;
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int num_rows_done, num_cols_done;
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struct proc *proc = 0;
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#ifndef __NetBSD__
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ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
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if (ret)
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goto fail;
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ret = rf_SCSI_AllocTUR(&tur_op);
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if (ret)
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goto fail;
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#endif /* !__NetBSD__ */
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num_rows_done = 0;
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num_cols_done = 0;
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RF_CallocAndAdd(disks, raidPtr->numRow, sizeof(RF_RaidDisk_t *), (RF_RaidDisk_t **), raidPtr->cleanupList);
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if (disks == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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raidPtr->Disks = disks;
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proc = raidPtr->proc; /* Blah XXX */
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/* get space for the device-specific stuff... */
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RF_CallocAndAdd(raidPtr->raid_cinfo, raidPtr->numRow,
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sizeof(struct raidcinfo *), (struct raidcinfo **),
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raidPtr->cleanupList);
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if (raidPtr->raid_cinfo == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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for (r = 0; r < raidPtr->numRow; r++) {
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numFailuresThisRow = 0;
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RF_CallocAndAdd(disks[r], raidPtr->numCol + ((r == 0) ? raidPtr->numSpare : 0), sizeof(RF_RaidDisk_t), (RF_RaidDisk_t *), raidPtr->cleanupList);
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if (disks[r] == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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/* get more space for device specific stuff.. */
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RF_CallocAndAdd(raidPtr->raid_cinfo[r],
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raidPtr->numCol + ((r == 0) ? raidPtr->numSpare : 0),
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sizeof(struct raidcinfo), (struct raidcinfo *),
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raidPtr->cleanupList);
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if (raidPtr->raid_cinfo[r] == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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for (c = 0; c < raidPtr->numCol; c++) {
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ret = rf_ConfigureDisk(raidPtr, &cfgPtr->devnames[r][c][0],
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&disks[r][c], rdcap_op, tur_op,
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cfgPtr->devs[r][c], r, c);
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if (ret)
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goto fail;
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if (disks[r][c].status != rf_ds_optimal) {
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numFailuresThisRow++;
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} else {
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if (disks[r][c].numBlocks < min_numblks)
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min_numblks = disks[r][c].numBlocks;
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DPRINTF7("Disk at row %d col %d: dev %s numBlocks %ld blockSize %d (%ld MB)\n",
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r, c, disks[r][c].devname,
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(long int) disks[r][c].numBlocks,
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disks[r][c].blockSize,
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(long int) disks[r][c].numBlocks * disks[r][c].blockSize / 1024 / 1024);
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}
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num_cols_done++;
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}
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/* XXX fix for n-fault tolerant */
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if (numFailuresThisRow > 0)
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raidPtr->status[r] = rf_rs_degraded;
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num_rows_done++;
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}
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#if defined(__NetBSD__) && defined(_KERNEL)
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/* we do nothing */
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#else
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rf_SCSI_FreeDiskOp(rdcap_op, 1);
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rdcap_op = NULL;
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rf_SCSI_FreeDiskOp(tur_op, 0);
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tur_op = NULL;
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#endif
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/* all disks must be the same size & have the same block size, bs must
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* be a power of 2 */
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bs = 0;
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for (foundone = r = 0; !foundone && r < raidPtr->numRow; r++) {
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for (c = 0; !foundone && c < raidPtr->numCol; c++) {
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if (disks[r][c].status == rf_ds_optimal) {
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bs = disks[r][c].blockSize;
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foundone = 1;
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}
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}
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}
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if (!foundone) {
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RF_ERRORMSG("RAIDFRAME: Did not find any live disks in the array.\n");
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ret = EINVAL;
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goto fail;
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}
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for (count = 0, i = 1; i; i <<= 1)
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if (bs & i)
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count++;
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if (count != 1) {
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RF_ERRORMSG1("Error: block size on disks (%d) must be a power of 2\n", bs);
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ret = EINVAL;
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goto fail;
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}
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for (r = 0; r < raidPtr->numRow; r++) {
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for (c = 0; c < raidPtr->numCol; c++) {
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if (disks[r][c].status == rf_ds_optimal) {
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if (disks[r][c].blockSize != bs) {
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RF_ERRORMSG2("Error: block size of disk at r %d c %d different from disk at r 0 c 0\n", r, c);
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ret = EINVAL;
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goto fail;
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}
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if (disks[r][c].numBlocks != min_numblks) {
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RF_ERRORMSG3("WARNING: truncating disk at r %d c %d to %d blocks\n",
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r, c, (int) min_numblks);
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disks[r][c].numBlocks = min_numblks;
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}
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}
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}
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}
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raidPtr->sectorsPerDisk = min_numblks;
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raidPtr->logBytesPerSector = ffs(bs) - 1;
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raidPtr->bytesPerSector = bs;
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raidPtr->sectorMask = bs - 1;
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return (0);
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fail:
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#if defined(__NetBSD__) && defined(_KERNEL)
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for (r = 0; r < raidPtr->numRow; r++) {
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for (c = 0; c < raidPtr->numCol; c++) {
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/* Cleanup.. */
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#ifdef DEBUG
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printf("Cleaning up row: %d col: %d\n", r, c);
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#endif
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if (raidPtr->raid_cinfo[r][c].ci_vp) {
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(void) vn_close(raidPtr->raid_cinfo[r][c].ci_vp,
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FREAD | FWRITE, proc->p_ucred, proc);
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}
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}
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}
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/* Space allocated for raid_vpp will get cleaned up at some other
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* point */
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/* XXX Need more #ifdefs in the above... */
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#else
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if (rdcap_op)
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rf_SCSI_FreeDiskOp(rdcap_op, 1);
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if (tur_op)
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rf_SCSI_FreeDiskOp(tur_op, 0);
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#endif
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return (ret);
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}
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/****************************************************************************************
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* set up the data structures describing the spare disks in the array
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* recall from the above comment that the spare disk descriptors are stored
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* in row zero, which is specially expanded to hold them.
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***************************************************************************************/
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int
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rf_ConfigureSpareDisks(
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RF_ShutdownList_t ** listp,
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RF_Raid_t * raidPtr,
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RF_Config_t * cfgPtr)
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{
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char buf[256];
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int r, c, i, ret;
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RF_DiskOp_t *rdcap_op = NULL, *tur_op = NULL;
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unsigned bs;
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RF_RaidDisk_t *disks;
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int num_spares_done;
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struct proc *proc;
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#ifndef __NetBSD__
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ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
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if (ret)
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goto fail;
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ret = rf_SCSI_AllocTUR(&tur_op);
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if (ret)
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goto fail;
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#endif /* !__NetBSD__ */
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num_spares_done = 0;
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proc = raidPtr->proc;
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/* The space for the spares should have already been allocated by
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* ConfigureDisks() */
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disks = &raidPtr->Disks[0][raidPtr->numCol];
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for (i = 0; i < raidPtr->numSpare; i++) {
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ret = rf_ConfigureDisk(raidPtr, &cfgPtr->spare_names[i][0],
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&disks[i], rdcap_op, tur_op,
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cfgPtr->spare_devs[i], 0, raidPtr->numCol + i);
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if (ret)
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goto fail;
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if (disks[i].status != rf_ds_optimal) {
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RF_ERRORMSG1("Warning: spare disk %s failed TUR\n", buf);
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} else {
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disks[i].status = rf_ds_spare; /* change status to
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* spare */
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DPRINTF6("Spare Disk %d: dev %s numBlocks %ld blockSize %d (%ld MB)\n", i,
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disks[i].devname,
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(long int) disks[i].numBlocks, disks[i].blockSize,
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(long int) disks[i].numBlocks * disks[i].blockSize / 1024 / 1024);
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}
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num_spares_done++;
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}
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#if defined(__NetBSD__) && (_KERNEL)
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#else
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rf_SCSI_FreeDiskOp(rdcap_op, 1);
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rdcap_op = NULL;
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rf_SCSI_FreeDiskOp(tur_op, 0);
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tur_op = NULL;
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#endif
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/* check sizes and block sizes on spare disks */
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bs = 1 << raidPtr->logBytesPerSector;
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for (i = 0; i < raidPtr->numSpare; i++) {
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if (disks[i].blockSize != bs) {
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RF_ERRORMSG3("Block size of %d on spare disk %s is not the same as on other disks (%d)\n", disks[i].blockSize, disks[i].devname, bs);
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ret = EINVAL;
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goto fail;
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}
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if (disks[i].numBlocks < raidPtr->sectorsPerDisk) {
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RF_ERRORMSG3("Spare disk %s (%d blocks) is too small to serve as a spare (need %ld blocks)\n",
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disks[i].devname, disks[i].blockSize, (long int) raidPtr->sectorsPerDisk);
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ret = EINVAL;
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goto fail;
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} else
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if (disks[i].numBlocks > raidPtr->sectorsPerDisk) {
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RF_ERRORMSG2("Warning: truncating spare disk %s to %ld blocks\n", disks[i].devname, (long int) raidPtr->sectorsPerDisk);
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disks[i].numBlocks = raidPtr->sectorsPerDisk;
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}
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}
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return (0);
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fail:
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#if defined(__NetBSD__) && defined(_KERNEL)
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/* Release the hold on the main components. We've failed to allocate
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* a spare, and since we're failing, we need to free things.. */
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for (r = 0; r < raidPtr->numRow; r++) {
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for (c = 0; c < raidPtr->numCol; c++) {
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/* Cleanup.. */
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#ifdef DEBUG
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printf("Cleaning up row: %d col: %d\n", r, c);
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#endif
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if (raidPtr->raid_cinfo[r][c].ci_vp) {
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(void) vn_close(raidPtr->raid_cinfo[r][c].ci_vp,
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FREAD | FWRITE, proc->p_ucred, proc);
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}
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}
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}
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for (i = 0; i < raidPtr->numSpare; i++) {
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/* Cleanup.. */
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#ifdef DEBUG
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printf("Cleaning up spare: %d\n", i);
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#endif
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if (raidPtr->raid_cinfo[0][raidPtr->numCol + i].ci_vp) {
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(void) vn_close(raidPtr->raid_cinfo[0][raidPtr->numCol + i].ci_vp,
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FREAD | FWRITE, proc->p_ucred, proc);
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}
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}
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#else
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if (rdcap_op)
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rf_SCSI_FreeDiskOp(rdcap_op, 1);
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if (tur_op)
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rf_SCSI_FreeDiskOp(tur_op, 0);
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#endif
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return (ret);
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}
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/* configure a single disk in the array */
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int
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rf_ConfigureDisk(raidPtr, buf, diskPtr, rdcap_op, tur_op, dev, row, col)
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RF_Raid_t *raidPtr; /* We need this down here too!! GO */
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char *buf;
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RF_RaidDisk_t *diskPtr;
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RF_DiskOp_t *rdcap_op;
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RF_DiskOp_t *tur_op;
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dev_t dev; /* device number used only in kernel */
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RF_RowCol_t row;
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RF_RowCol_t col;
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{
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char *p;
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int retcode;
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struct partinfo dpart;
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struct vnode *vp;
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struct vattr va;
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struct proc *proc;
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int error;
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retcode = 0;
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p = rf_find_non_white(buf);
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if (p[strlen(p) - 1] == '\n') {
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/* strip off the newline */
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p[strlen(p) - 1] = '\0';
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}
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(void) strcpy(diskPtr->devname, p);
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#ifndef __NetBSD__
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/* get bus, target, lun */
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retcode = rf_extract_ids(p, &busid, &targid, &lun);
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if (retcode)
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return (retcode);
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/* required in kernel, nop at user level */
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retcode = rf_SCSI_OpenUnit(dev);
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if (retcode)
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return (retcode);
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diskPtr->dev = dev;
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if (rf_SCSI_DoTUR(tur_op, (u_char) busid, (u_char) targid, (u_char) lun, dev)) {
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RF_ERRORMSG1("Disk %s failed TUR. Marked as dead.\n", diskPtr->devname);
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diskPtr->status = rf_ds_failed;
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} else {
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diskPtr->status = rf_ds_optimal;
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retcode = rf_SCSI_DoReadCapacity(raidPtr, rdcap_op, busid, targid, lun, dev,
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&diskPtr->numBlocks, &diskPtr->blockSize, diskPtr->devname);
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if (retcode)
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return (retcode);
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/* we allow the user to specify that only a fraction of the
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* disks should be used this is just for debug: it speeds up
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* the parity scan */
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diskPtr->numBlocks = diskPtr->numBlocks * rf_sizePercentage / 100;
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}
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#endif
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proc = raidPtr->proc; /* XXX Yes, this is not nice.. */
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/* Let's start by claiming the component is fine and well... */
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/* XXX not the case if the disk is toast.. */
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diskPtr->status = rf_ds_optimal;
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raidPtr->raid_cinfo[row][col].ci_vp = NULL;
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raidPtr->raid_cinfo[row][col].ci_dev = NULL;
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error = raidlookup(diskPtr->devname, proc, &vp);
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if (error) {
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printf("raidlookup on device: %s failed!\n", diskPtr->devname);
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if (error == ENXIO) {
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/* XXX the component isn't there... must be dead :-( */
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diskPtr->status = rf_ds_failed;
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} else {
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return (error);
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}
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}
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if (diskPtr->status == rf_ds_optimal) {
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if ((error = VOP_GETATTR(vp, &va, proc->p_ucred, proc)) != 0) {
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return (error);
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}
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error = VOP_IOCTL(vp, DIOCGPART, (caddr_t) & dpart,
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FREAD, proc->p_ucred, proc);
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if (error) {
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return (error);
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}
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diskPtr->blockSize = dpart.disklab->d_secsize;
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diskPtr->numBlocks = dpart.part->p_size - rf_protectedSectors;
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raidPtr->raid_cinfo[row][col].ci_vp = vp;
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raidPtr->raid_cinfo[row][col].ci_dev = va.va_rdev;
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#if 0
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diskPtr->dev = dev;
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#endif
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diskPtr->dev = va.va_rdev; /* XXX or the above? */
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/* we allow the user to specify that only a fraction of the
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* disks should be used this is just for debug: it speeds up
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* the parity scan */
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diskPtr->numBlocks = diskPtr->numBlocks * rf_sizePercentage / 100;
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}
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return (0);
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}
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